Single Theme Ad Groups (STAGs) are a great alernative to SKAGs. They are easier to manage and can be used with automated bids. However they can be quite complicated to setup.
With this tool you can generate 1.000+ different ad groups in seconds.
It will even cross match each ad group to generate a unique negative keyword list for each ad group!
Simply add your keywords, create a few ads and after the review step you will be able to download a CSV file with all your campaign data. You can upload this file to your Google Ads account using the free Google Ads Editor AppBuild your first campaign